I earn a very little from the faucets. Those small amount was used for the transaction fee and for the small betting. With bitcoin right now we can do all sort of things that's possible with fiat.
Earning small if the first step on earning and making big money,no business is done and fix at high salary at first time opening same as being in bitcoin, starting is hard.Yes bitcoin can be spend almost on all things like fiat currency.Almost all things now is can be paid with bitcoins
I don't think that it is still possible to buy anything with bitcoins as the usage and acceptance of bitcoins is very limited especially in offline world where you do no find any place to buy anything and even there are very few online sites that accepts bitcoin as a mode of payment.